<template>
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理项目</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <el-container>
      <!-- 侧边 -->
      <el-aside :width="isCollapse? '64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse" >|||</div>
        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#3b93f6"
          unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath"
        >
        <!-- 一级导航 -->
          <el-submenu :key="item.id" :index="item.id + ''" v-for="item in menuList">
            <template slot="title">
                <!-- 字体图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文字 -->
              <span>{{item.authName}}</span>
            </template>
           <!-- 二级导航 -->
              <el-menu-item :key="subItem.id" :index="'/' + subItem.path + ''" v-for="subItem in item.children" @click="saveNavState('/' + subItem.path)">
                  <i class="el-icon-menu"></i>
                  <span>{{subItem.authName}}</span>
              </el-menu-item>
            
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 内容 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>



<script>
export default {
    data() {
        return {
            // 左侧菜单数据
            menuList:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao',
           },
           // 是否折叠
           isCollapse:false,
          //  被激活的链接地址
           activePath:''
        }
    },
    created(){
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
    logout() {
      // 1.清除token 实现退出
      window.sessionStorage.clear();
      // 2.跳转到login 页面
      this.$router.push("/login");
    },
    // 获取所有菜单列表
    async getMenuList() {
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    //   console.log(res);
    },
    // 点击按钮切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
};
</script>

<style scoped lang="less">
.home_container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border: 0;
  }
}
.el-main {
  background-color: #e4f5ef;
}
.iconfont {
    margin-right: 10px;
}
.toggle-button{
   background-color: #4A5064;
   font-size: 10px;
   line-height: 24px;
   color: #fff;
   text-align: center;
   cursor: pointer;
   letter-spacing: 0.2em;
}
</style>
